The Improved Deadbeat Current Predictive Control Strategy for Bidirectional Interleaved Parallel Totem Pole Power Factor Correction Circuits
Li Jianghan1,2, Meng Runquan1,2, Wang Linsen1,2, Zhao Jiapeng1,2, Han Xiaoqing1,2
1. School of Electrical Engineering Taiyuan University of Technology Taiyuan 030024 China; 2. Key Laboratory of Clean and Intelligent Control on Coal & Electricity Ministry of Education Taiyuan University of Technology Taiyuan 030024 China
Abstract：Driven by the fossil fuel crisis, ecological pressures, and the dual carbon goals, the new energy vehicle industry has experienced explosive growth. Electric vehicles have entered a phase of large-scale development with robust momentum. This industrial transformation places great demands on onboard charger technology for electric vehicles. The interleaved parallel totem pole power factor correction (PFC) circuit offers advantages such as low conduction losses, high power density, and low current ripple. Current control methods for continuous inductive current mode in interleaved parallel totem pole bridgeless (TTPL) PFC circuits include peak current control, hysteresis current control, and average current control. However, these approaches struggle to meet the real-time and precision requirements of current tracking, resulting in high AC-side current harmonic distortion and poor dynamic response in bidirectional vehicle chargers. Therefore, this paper proposes an improved control strategy for the bidirectional interleaved parallel TTPL PFC circuit. Firstly, after analyzing the topology and operating principles of the interleaved parallel TTPL PFC, a discrete mathematical model is developed, using a single-phase interleaved parallel TTPL PFC as an example. The control equations for the deadbeat predictive current control method are derived, and the impact of control delay on the control system is discussed. Then, an improved control strategy is proposed. Based on the discrete modeling, the strategy establishes a two-step recursive prediction architecture combined with a dynamic parameter compensation mechanism. Specifically, it predicts the current at time k+2 to enhance the deadbeat predictive current control and replace the current inner loop of PI control. Given the strong periodicity of grid voltage, its short-term variation trends can be predicted. Here, the Lagrange interpolation method is introduced to perform linear extrapolation and obtain the grid voltage in the two-step recursive prediction framework. Additionally, a phase-locked loop based on second-order generalized integration is incorporated to ensure precise control of the grid-side current frequency and phase. Then, the system control loop and stability are analyzed. Simulation results in Matlab/Simulink demonstrate that the improved deadbeat predictive current control reduces the impact of delay on real-time performance, accelerates the system's dynamic response, suppresses output current distortion, and enhances system stability. A 6.6 kW onboard AC-DC experimental platform with a 220 V AC port and a 400 V DC port was constructed. Experimental tests were conducted to compare three control strategies: improved deadbeat predictive current control, conventional deadbeat predictive current control, and conventional PI control. The results demonstrate that using the improved deadbeat predictive current control, the grid-side current THD remains below 4.227%, steady-state output voltage ripple falls below 3.5%, and the system rapidly recovers to steady-state operation within 0.1 s following load transients and grid-side voltage fluctuations. Compared to the other two control methods, it exhibits lower current harmonics, faster dynamic response, and enhanced disturbance immunity.
李江涵, 孟润泉, 王林森, 赵嘉鹏, 韩肖清. 双向交错并联图腾柱功率因数校正电路改进无差拍电流预测控制策略[J]. 电工技术学报, 2026, 41(20): 7071-7085.
Li Jianghan, Meng Runquan, Wang Linsen, Zhao Jiapeng, Han Xiaoqing. The Improved Deadbeat Current Predictive Control Strategy for Bidirectional Interleaved Parallel Totem Pole Power Factor Correction Circuits. Transactions of China Electrotechnical Society, 2026, 41(20): 7071-7085.
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